package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetMealDishMapper setMealDishMapper;
    /**
     * 新增菜品
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithFavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品插入数据
        dishMapper.insert(dish);
        //获取返回的id
        Long dishId = dish.getId();
        List<DishFlavor> dishFlavors = dishDTO.getFlavors();
        if (dishFlavors != null && !dishFlavors.isEmpty()){
            dishFlavors.forEach(dishFlavor -> dishFlavor.setDishId(dishId));
            dishFlavorMapper.insertBatch(dishFlavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断是否有起售菜品
        ids.forEach(id -> {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });

        //判断当前菜品是否被关联
        List<Long> setMealIds = setMealDishMapper.getSetMealIdsByDishIds(ids);
        if (setMealIds != null && !setMealIds.isEmpty()){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品数据
        //删除菜品口味数据
//        ids.forEach(id -> {
//            dishMapper.deleteById(id);
//            dishFlavorMapper.deleteByDishId(id);
//        });

        dishMapper.deleteBatchByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);


    }
}
